September · Australia
Best time to visit Hamilton Island in September Weather, crowds & prices
Weather in Hamilton Island in September
Average temperature 23°C, 11 mm of rain, about 27 days with 6+ hours of sunshine and 72% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.7/10
Ranked #1 of 12 months
- Avg temp
- 23°C
- Rainfall
- 11 mm
- Humidity
- 72%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Hamilton Island scores 9.7/10 for beach and coastal travel - the single best month of the year. Expect around 23°C, 11 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Hamilton Island is a Whitsundays resort isle-yacht views, reef day boats, and hilltop lookouts. Best window: the drier months outside peak monsoon.
September in Hamilton Island — the year's strongest window
September averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rain is a non-issue at 11 mm for the month, with about 27 days with 6+ hours of sunshine and 11.9 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Hamilton Island at 9.7/10 — the reference point every other month on this page is measured against.
Pack light clothing, swimwear and real sun protection.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Hamilton Island in September?
- In September, Hamilton Island averages 23°C, 11 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 9.7/10.
- Is September a good time to visit Hamilton Island?
- September earns a 9.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Hamilton Island in September?
- Expect about 11 mm of rain in September. Average humidity is 72% and there are about 27 days with 6+ hours of sunshine.
Curated in Hamilton Island
Tickets & experiences
Things to do in Hamilton Island
Hamilton Island, Australia. Live activities and tours from GetYourGuide, matched to this destination.